WEBVTT INDEFINITELY BECAUSE OF MINE SUBSIDENCE. IT'S CLOSED BETWEEN THE MAIN ENTRANCE OF BOYCE PARK AND TRESTLE ROAD. ONE OF OUR TOP STORIES TONIGHT, DID PITTSBURGH'S FORMER MAYOR DESTROY EVIDENCE FROM HIS CITY-ISSUED COMPUTER? THAT IS WHAT UPMC WANTS TO KNOW TONIGHT. THE HEALTH CARE GIANT WANTS TO KNOW IF LUKE RAVENSTAHL DELETED INFORMATION RELATED TO THE CITY'S LEGAL BATTLE WITH UPMC OVER ITS STATUS. WE SENT "ACTION NEWS" REPORTER BOB MAYO OUT IN SEARCH OF ANSWERS. WHAT HAPPENED WHEN YOU CONFRONTED THE MAYOR? Reporter: HE MADE IT CLEAR, HE DIDN'T WANT REPORTERS AND DIDN'T WANT TO BE ANSWERING QUESTIONS. HE SIGNED A BINDING LEGAL PLEDGE TO PRESERVE ALL POTENTIAL EVIDENCE IN THE UPMC CASE. THAT DOCUMENT MADE IT CLEAR THAT NOT OBEYING IT COULD BRING MONETARY AND OTHER COURT SANCTIONS AGAINST HIM. NOT ONLY AS MAYOR, BUT INDIVIDUALLY AND PERSONALLY. WE WENT KNOCKING AT EX-MAYOR RAVENSTAHL'S HOME. AS WE WERE LEAVING, HE PULLED UP AND WARNED "DON'T COME ON MY PROPERTY," BUT WOULDN'T ANSWER ANY QUESTIONS. WHAT DO YOU HAVE TO SAY ABOUT UPMC'S FILING, MAYOR? CAN WE TALK TO YOU? BUT JOY FLOWERS CONTE HAS ORDERED A RESPONSE TO UPMC'S DEMAND FOR A SWORN DEPOSITION FROM RAVENSTAHL AND AN INDEPENDENT FORENSIC COMPUTER EXPERT TO CHECK WHETHER RAVENSTAHL WIPED HIS CITY COMPUTER OF EVIDENCE RELATED TO HIS COURT FIGHT WITH UPMC. WHEN RAVENSTAHL TOOK HIS DESKTOP CITY COMPUTER HOME FOR MORE THAN A WEEK AND DIDN'T RETURN IT UNTIL ASKED. WE ASKED MAYOR PEDUTO. DO YOU THINK THERE'S ANY CHANCE THE FORMER MAYOR DELETED FILES? I HAVE NO IDEA. MY ENTIRE HOPE OUT OF ALL THIS IS TO STAY AWAY FROM THE QUAGMIRE THAT HAS BEEN THE PAST SEVEN YEARS. Reporter: UPMC VICE PRESIDENT PAUL WOOD TELLS US, "UPMC HAS A RIGHT TO KNOW IF MAYOR RAVENSTAHL DELETED ANYTHING FROM HIS COMPUTER THAT WAS RELATED TO THE LAWSUIT HE INITIATED AGAINST UPMC. WE HAVE NO IDEA WHAT INFORMATION HE MAY HAVE DESTROYED, OR FOR THAT MATTER, WHO MAY HAVE DIRECTED HIM TO DO SO. RAVENSTAHL'S PERSONAL ATTORNEY, CHUCK PORTER, DECLINED TO COMMENT ON UPMC'S STATEMENTS OR ON THE ONGOING FEDERAL PROBE OF THE CITY UNDER RAVENSTAHL. MAYOR PEDUTO'S ADMINISTRATION TURNED RAVENSTAHL'S CITY COMPUTER OVER TO THE FBI FOR ANALYSIS AFTER IT VANISHED, THEN REAP REAPPEARED. AND TO ALLOW THE FEDERAL INVESTIGATION AND THOSE WITH THE BADGES AND THE GUNS TO DETERMINE AND THOSE THAT ARE THE LAWYERS AND THE JUDGES TO MAKE THOSE DECISIONS. WE HAVE FAR TOO MUCH TO DO TO THEN TO BE CAUGHT INTO THE MESS OF A PREVIOUS ADMINISTRATION. Reporter: WE'RE WATCHING TO SEE WHAT RESPONSE THE FORMER MAYOR AND HIS ATTORNEYS FILE WITH THE JUDGE BY FRIDAY OF THIS